Valves having involute sealing surfaces
US5305988A · kind A · utility
14Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1992 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Sep 24, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Two embodiments of a metal valve, each having a body with flow passages and curved internal sealing surfaces and a valve member with a flow passage and external curved sealing surfaces. Both the body and valve member sealing surfaces are curved as a portion of the involute of a circle and are sealingly engageable. The valve member is mounted in the body for rotation between open and closed positions, permitting and preventing flow through valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.